I couple of young men sat down to my right at the silhouette range. they had a variety of guns, including a new .50 AE semi-auto (maybe a Grizzly?) one had just bought. As they shot the other guns, they were obviously inexperienced, and were not particularly conscious of muzzle discipline. Then they moved on to the big gun.
The young man whose gun it was struggled mightily to run the slide and chamber a round. Note the operative words "chamber a round." A range officer observed the difficulty and came over to offer advice. he told the young man to place the but of the grip on his stomach, which is a technique I generally approve of in such situations. He didn't mention to first turn your body sideways to the firing line! So this fellow, under the watchful and approving eye of the range officer, puts the LOADED AND CHAMBERED .50 AE on his belly, pointing straight ta me! They all looked up surprised when I tried to push my stool backwards and ended up falling over then crabwalking away from the line, then went back t re-racking the loaded gun with it STILL POINTED STRAIGHT DOWN THE FIRING LINE!
I sat back on the benches behind them, waited until they took a break, then packed up and fled. I was not about to stay on a line when the range officers were instructing people to point loaded big-bore guns at other people.